Leaf area index (LAI) reduction
nounPronunciation: /liːf ˈeəriə ˈɪndeks rɪˈdækʃən/
The decrease in total leaf area relative to ground area occupied by a plant in response to abiotic stress, reducing surface area for water loss and radiation interception. LAI reduction is a structural adaptation that improves water conservation during drought or extreme light conditions.
Plain English
The decrease in the total amount of leaf surface on a plant, which helps reduce water loss during stress.
Etymology & History
Usage
"Significant LAI reduction was observed in drought-stressed plants, correlating with reduced transpiration rates."
Style guide notes: Specify measurement method and time point when reporting LAI reduction values for clarity.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How is LAI reduction measured in stressed plants?
Using leaf area meters, image analysis, or allometric equations comparing stressed to control plants.
Is LAI reduction always beneficial for plant survival?
Generally yes during stress, but excessive reduction decreases photosynthetic capacity and growth recovery.
Why Test Candidates on This?
Important phenotypic indicator for drought and stress tolerance screening in field and greenhouse trials.
Required skill level: Junior